ASTM_D_5042_-_90_2009.pdf

Designation:D504290(Reapproved 2009)Standard Test Method forEstimating the Organic Fouling of Particulate AnionExchange Resins1This standard is issued under the fixed designation D5042;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method provides a general estimate of theorganic fouling of an anion exchange resin based upon totalorganic carbon measurements.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specifichazard statement,see 8.3.2.Referenced Documents2.1 ASTM Standards:2D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD2187 Test Methods for Physical and Chemical Propertiesof Particulate Ion-Exchange ResinsD2579 Test Method for Total Organic Carbon in Water(Withdrawn 2002)3D2687 Practices for Sampling Particulate Ion-Exchange Ma-terialsD4839 Test Method for Total Carbon and Organic Carbon inWater by Ultraviolet,or Persulfate Oxidation,or Both,andInfrared Detection3.Terminology3.1 DefinitionsFor definitions of terms used in this testmethod,refer to Terminology D1129.3.2 Definitions of Terms Specific to This Standard:3.2.1 organic foulingbuildup of organic material in or onanion exchange resins by sorption during the service cycle andincomplete removal during regeneration.4.Summary of Test Method4.1 A sample of particulate anion exchange material iscontacted with a sodium chloride/sodium hydroxide solution atan elevated temperature.After a specified contact time,theconcentration of organic material in the aqueous phase ismeasured as total organic carbon4(TOC).5.Significance and Use5.1 One of the major factors in the unsatisfactory perfor-mance of anion exchange resins is their fouling by organicmaterial.Knowledge of the degree of fouling can be used toassess the condition of the resin and may indicate the need forpretreatment of the influent,remedial cleaning procedures,orresin replacement.5.2 It is recognized that this test method may not removeand detect cation sloughage products or declumping agents.Itis not intended to remove all organic compounds from theresin.5.3 Since the chemical structures of organics compoundsfouling the resin are generally unknown and are expressed onlyon the basis of their carbon content,interpretation of testresults to form a basis for predictions for resin performance orcleaning procedures should be approached with caution.5.4 Samples may be taken before or after plant regeneration,or both,depending on the type of information desired.Thisdecision is left to the judgment of the user.6.Interferences6.1 The high sodium chloride(NaCl)concentration of thetest solutions may interfere with the response of the totalorganic carbon analyzer.The response of the instrument shouldbe determined using standards prepared in this matrix.1This test method is under the jurisdiction of ASTM Committee D19 on Waterand is the direct responsibility of Subcommittee D19.08 on Membranes and IonExchange Materials.Current edition approved May 1,2009.Published June 2009.Originallyapproved in 1990.Last previous edition approved in 2004 as D5042 90(2004)1.DOI:10.1520/D5042-90R09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Fisher,S.,and Otten,G.,“Standardization of Methodology for Estimating theOrganic Fouling of Ion Exchange Resins,”Proceedings of the International WaterConference,October 1989.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.Apparatus7.1 Instrument to determine total organic carbon are asspecified in Test Methods D2579,OxidationInfrared Detec-tion test method,or D4839.TOC instruments using conduc-tivity detection have also been found to be suitable.Theinstrument must be capable of measuring CO2formed withoutNaCl interference.8.Reagents8.1 Purity of ReagentsReagent grade chemicals shall beused in all tests.Unless otherwise indicated,it is intended thatall reagents shall conform to the specifications of the Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.5Other grades may beused,provided it is first ascertained that the reagent is ofsufficiently high purity t